CSV Cleaner
Upload a CSV file, choose your cleaning options, download the result
Drop your CSV here
or click to browse · .csv, .tsv files
Find
Replace
✓ Done
Showing first 100 rows
How it works
01
Upload
Drop your CSV file. It loads in your browser — nothing is uploaded anywhere.
02
Choose options
Pick which cleaning operations to apply. Preview updates live.
03
Download
Download your cleaned CSV file instantly.
Common questions
Is this CSV cleaner really free?
Yes, completely free. No sign up, no subscription, no limits. We show ads to keep it free.
Are my CSV files private?
Completely. All processing happens in your browser using JavaScript. Your files never leave your device or get uploaded anywhere.
What file formats are supported?
CSV, TSV, and plain text files with comma or tab delimiters. Most spreadsheet exports work automatically.
Is there a row limit?
No hard limit. Files with hundreds of thousands of rows work fine — the preview shows the first 100 rows but the full file is downloaded.
What does "remove duplicates" mean exactly?
It removes rows where every column value is identical to another row. The first occurrence is kept, subsequent duplicates are deleted.
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